Any receiver can potentially transmit, or re-transmit a signal.
Modern airliners are heavily dependent on properly functioning 
electronics, especially at takeoff.
When it comes to the safety of 100+  passengers, a lot of airlines would 
rather annoy the occasional GPS user.
The Capitan of the aircraft has the final say on what goes on his 
flight, much as the Capitan of a sailing ship. I think they can also 
perform marriages, if the flight is long enough! ;-)



Bill Brightman wrote:
> Does anyone have an idea of the logic behind banning use of GPS units 
> in flight?
> I can see why devices which emit a signal, like a cell phone, could be 
> suspected of possibly interfering with the plane's electronics. But it 
> seems like a GPS would be more along the lines of an MP3 player or 
> something. Just wondering if I'm missing the point here...
>  
> Bill B.
>
> */loranwilcox@chartermi.net/* wrote:
>
>     On my way to Phoenix I was told by the first flight they were not
>     allowed. On the second leg I was told it was OK.
>
>     By the way I am still in AZ as My flight home got cancel. I
>     staying tonight down by Town Lake so I'm off to cache.
>
>     Team Sand Dollar
>
>     ---- ShadowAce wrote:
>     > I have used mine on the last 4 flights I was on. It depends on
>     the airline,
>     > as well as the captain. The captain of the plane has the
>     authority to say no
>     > and remove you from the flight.
>     >
>     > My father got in serious trouble for simply taking a photograph
>     of my mother
>     > on a flight and it got ugly. Simple advice he gave me afterwards
>     is if they
>     > say no, do not argue. You lose a lot of your rights while on a
>     plane :)
>     >
>     > On Fri, Mar 21, 2008 at 8:56 AM, Team Nine Lives
>     > wrote:
>     >
>     > > While on a recent Continental flight, I checked their
>     in-flight magazine
>     > > and saw that GPS receivers were allowed above 10,000 feet. So
>     when we got
>     > > to that altitude, I pulled mine out. Shortly afterward the
>     flight attend
>     > > told me, "no," and I shut it down but pointed out it was
>     supposed to be
>     > > allowed. He consulted the magazine, apologized, and let me use
>     it, saying
>     > > that this was a recent change that had not flowed to him yet.
>     > >
>     > > If this is true, it's good of Continental to make that change.
>     I like
>     > > knowing what the name of the lake or feature is that I'm
>     passing over and
>     > > how much longer it will be until we get there, etc.
>     > >
>     > > Brad, 1/2 of Team Nine Lives
>     > >
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